Analysis of the impact of observing environmental changes on the observation quality of Shigatse Seismic Station
Using the three-component continuous waveform data observed by the Shigatse Seismic Station,the noise power spectrum probability density method was applied to calculate the corresponding background noise RMS value and noise power spectrum density for the time scales of year,season,day,etc.The study found that the changes in the observation environment of the Shigatse Seismic Station had an impact on its seismic observation,and the noise level at the station base had been reduced from Class Ⅰ to Class Ⅱ.With the rapid development of urbanization in the country,the number of self-built houses around the Shigatse Seismic Station has increased,and the number of vehicles driving on the road has increased.Vehicle interference,construction interference,and other artificial noise are the main sources of interference that affect the seismic observation of the Shigatse Seismic Station,mainly manifested as high-frequency information(1-30 Hz).High-frequency interference is the main source of noise in earthquake observation.It is recommended that seismometers be installed in caves and underground to effectively reduce strong interference caused by high-frequency,short-period,and other human activities.
background noiseobservational environment changesprobability density functionhigh-frequency interference
万方数据
维普
